Intravascular catheter with multiple axial fibers
US6709429B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2000 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jan 19, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/0053
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An intravascular catheter having a shaft, at least a portion of which includes a braid reinforcement with a plurality of axial members disposed between the helical members that form the braid. The axial members provide a number of advantages including: maintaining one-to-one correspondence in axial manipulation; maintaining uniform flexibility in several planes of flexure; reducing the likelihood of causing a curling effect; increasing the strength of connections between shaft segments; uniformly increasing stiffness of the catheter; and increasing the burst strength of the catheter. By positioning the axial members between the helical members, the axial members do not create a protrusion and do not become fixed to any adjacent polymer layer. Thus, the benefits of axial members are retained, without creating the undesirable effects of friction caused by an axial protrusion and without creating the undesirable effects of limited flexure caused by an adjacent polymer layer becoming fixed to the axial member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.